选择题：It is exremely difficult for me to keep () on my study in such a noisy environment.

We demanded that we () of any change in the plan.

It will take a long time() a broken relationship .

He was() from his position as the president of the university.

The political situation is steadily () in that country. More and more people are getting involved in the dispute.

It won t be long () they are falling out over that money their mother left them, or I m Dutchman.